diff --git a/libraries/AP_GPS/AP_GPS_HIL.cpp b/libraries/AP_GPS/AP_GPS_HIL.cpp
index 5a3c5661b7..d55beca3f9 100644
--- a/libraries/AP_GPS/AP_GPS_HIL.cpp
+++ b/libraries/AP_GPS/AP_GPS_HIL.cpp
@@ -22,6 +22,7 @@ AP_GPS_HIL::AP_GPS_HIL(Stream *s) : GPS(s)
 // Public Methods //////////////////////////////////////////////////////////////
 void AP_GPS_HIL::init(void)
 {	
+	idleTimeout = 1200;
 }
 
 bool AP_GPS_HIL::read(void)
diff --git a/libraries/AP_GPS/AP_GPS_IMU.cpp b/libraries/AP_GPS/AP_GPS_IMU.cpp
index 3e3131b07f..84cf24d045 100644
--- a/libraries/AP_GPS/AP_GPS_IMU.cpp
+++ b/libraries/AP_GPS/AP_GPS_IMU.cpp
@@ -41,7 +41,8 @@ AP_GPS_IMU::AP_GPS_IMU(Stream *s) : GPS(s)
 void 
 AP_GPS_IMU::init(void)
 {
-        // we expect the stream to already be open at the corret bitrate
+	// we expect the stream to already be open at the corret bitrate
+	idleTimeout = 1200;
 }
 
 // optimization : This code doesn't wait for data. It only proccess the data available.